Martha: But the thing is, why'd you leave him behind, Doctor?
The Doctor: [dismissively] I was busy.
Martha: Is that what happens though, seriously? You just get bored of us one day and disappear?
Captain Jack: Not if you're blonde.
Martha: [sarcastically] Oh, she was blonde! Oh, what a surprise!
The Doctor: [spinning around, irritated] You two, we're at the end of the universe. Okay?! Right at the edge of knowledge itself! And you're busy... [struggling to find the right word] blogging!!